No harm in doing both, but if it came to a legal situation then call logs are also recorded.

Gotcha.

There are a few articles from recent years about Msgr Mellone (email I linked above) trying to help victims of abuse in the archdiocese so I think you would have a pretty good chance of making more progress if you felt comfortable emailing him.

Sorry this has happened to you. I live in a different diocese, but there is a phone number on this page https://www.usccb.org/offices/child-and-youth-protection/victim-assistance for the person supposedly in charge of handling abuse reports. If I were you I would be spamming her phone number (not email because that is more easily ignored) until some progress was made.

I can totally understand if you do not want to do this, but you might get further also by contacting the current priest of the parish, according to the website his email is mellone@annunciationdc.org. Priests usually have a direct line of contact with their bishop so there is a decent chance that he would be able to escalate it to Archbishop Gregory. What you are asking for is not a big ask, you just have to get through the layers of bureaucracy.

Best of luck.